Struggling bad.

My daughter is 7 months old, and usually she’s a really amazing baby for sleeping during the night. But for the past 4/5 nights, she’s been screaming, crying, reusing to drink for about 4-5 hours. She’s been having capol as I think she’s teething, but I’m finding it really difficult. Her dad does help me, quite a lot, but it’s just getting me down. Like, he does help me, but I’m finding myself struggling ☹️ I’ve cried more the past 3 nights than in the past year. Not sure what to do? She’s my absolute world. And so is he. I just don’t know what to do, ive probably slept about 15 hours since Monday. So I’m extremely tired, and physically and mentally drained